The House of the Estates (Finnish: Säätytalo, Swedish: Ständerhuset) is a historical building in Helsinki, Finland. It is located opposite of the Bank of Finland building, immediately northeast of Helsinki Cathedral. From 1891, when it was built, it housed the three commoner estates of the four estates of the realm of Finland (see Diet of Finland); there is a separate House of Nobility. The estates were superseded at the 1906 parliamentary reform by the foundation of the unicameral parliament of Finland.